Extract memind_adm admin server, add local dev tooling, and remove image-generation.

Split platform admin and ops APIs into standalone admin-server.mjs with network guards; simplify billing to RMB token pricing, refactor user auth, and add rsync deploy plus local-test scripts and docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/seed-plaza-demo.mjs

@@ -6,7 +6,6 @@ import { fileURLToPath } from 'node:url';
 import { createDbPool, initSchema } from '../db.mjs';
 import { createPlazaPostService } from '../plaza-posts.mjs';
 import { initializeDefaultSpace } from '../mindspace.mjs';
-import { EXTRA_DEMO_POSTS } from './plaza-demo-posts.mjs';
 
 const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');
 
@@ -26,7 +25,7 @@ function loadEnvFile(filePath) {
 loadEnvFile(path.join(root, '../../.env.local'));
 loadEnvFile(path.join(root, '.env'));
 
-const BASE_DEMO_POSTS = [
+const DEMO_POSTS = [
   {
     category: 'work-report',
     title: 'Q2 产品增长复盘：从 0 到 10 万 DAU',
@@ -199,8 +198,6 @@ const BASE_DEMO_POSTS = [
   },
 ];
 
-const DEMO_POSTS = [...BASE_DEMO_POSTS, ...EXTRA_DEMO_POSTS];
-
 async function loadUser(pool, username) {
   const [rows] = await pool.query(
     `SELECT id, username, slug, display_name FROM h5_users WHERE username = ? LIMIT 1`,